Performance

Performance Improvements in vSAN 7 U1

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With the announcement of vSAN 7 U1, VMware introduces several enhancements that improve the performance of vSAN and VMware Cloud Foundation (VCF) environments powered by vSAN. How much of an improvement? This will vary depending on the configuration and workloads, but VMware estimates customers may see up to 30% improvement in performance when comparing vSAN Read more...

VM Consolidated Performance View in vSAN 7 U1

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Monitoring and troubleshooting virtual machine (VM) performance inevitably leads to a desire to compare the performance characteristics between two or more VMs. This typically means that the administrator must navigate back and forth between multiple locations in the User Interface (UI) of vCenter Server. While this practice is effective, it is not as efficient as Read more...

Space Efficiency Using the New “Compression only” Option in vSAN 7 U1

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Space efficiency techniques used with storage systems aim to achieve one goal: lower storage costs through reduced capacity consumption. VMware vSAN offers several space efficiency options to meet a variety of needs of our customers, but with vSAN 7 U1, we improve this flexibility by introducing another option for space efficiency: "Compression only." Let’s look Read more...

vSAN Design Considerations – Deduplication and Compression

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The post “Write Buffer Sizing in vSAN when Using the Very Latest Hardware” described many of the basics around vSAN’s implementation of a two-tier storage system, and how hardware can change the performance of the system. How do software-related settings such as deduplication and compression impact performance? Let’s step through what it is, how it Read more...
vSAN Performance Metrics

Monitoring vSAN Performance

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Determining the root cause of performance issues in any environment can be a challenge, but with environments running dozens, if not hundreds of virtual workloads, pinpointing the exact causes, and understanding the options for mitigation can be difficult for even the experienced administrator. Since a vSAN cluster is made up of locally-attached disks, there are Read more...

What is the Maximum vSAN VMDK Size?

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How big should my VMDKs be on vSAN? I recently was asked about VMDK size best practices with vSAN. The maximum supported VMDK size is 62TB. Much like discussions around the largest size for a vSAN or vSphere cluster (Check out this post!), this is very much a nuanced operational discussion with a lot of Read more...

Performance Capabilities in Relation to vSAN Cluster Size

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The flexibility of cluster design and sizing is one of the key benefits with vSAN. This naturally leads to questions on the performance capabilities of vSAN relative to cluster size. Will an application run faster if the cluster consists of more hosts versus fewer hosts? The simple answer is “no” and has been covered in Read more...
vForum

#vSANChat: How to Make the Most of vForum Online Fall 2019

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vSAN Tweet Chats give you the unique opportunity to participate in a live discussion with VMware experts and ask all of your burning questions related to the topic at hand. We previously discussed tips for getting started with vSAN and how to prepare for VMworld. In our most recent #vSANChat, we turn our attention towards Read more...